We have all the pics and details of each 2011 Infiniti M model. More powerful, more efficient, the models will surely find a fanbase.

The all-new 2011 Infiniti M37 and Infiniti M56 will go on sale across North America beginning in spring 2010. Infiniti will unveil the new sedan to the public in Los Angeles later today.

Using a 3.7-liter, aluminum-alloy DOHC V6 engine, the M37 receives 330 horsepower and up to 270 ft-lb of torque. This is an improvement of 27 hp and 8 ft-lb over the 3.5-liter V6 used on the M35.

Meanwhile, the M56 uses a dramatically more powerful engine compared to the M45. The new car gets 420 horsepower and 417 ft-lb of torque from its 5.6-liter direct-injection DOHC aluminum-alloy V8 engine. This is an increase of 95 hp and 81 ft-lb over the 4.5-liter V8 on the M45. Seven-speed automatic transmissions come stanadard on the rear-wheel drive cars. An upgrade to Intelligent All-Wheel Drive is available.

The Japanese automaker claims that, despite the bigger, beefier engines, the new vehicles will achieve better fuel economy than their predecessors. This is partly due to the four different modes available through the Infiniti Drive system. The system "adjusts throttle sensitivity and transmission mapping to help optimize performance," according to a press release. Choices include Eco, Snow, Sport, and Standard. While the Sport mode allows a higher redline and more power-optimized shift points, the Eco setting automatically adjusts the throttle for fuel economy.

Two blind spot systems alert the driver of vehicles in hidden areas, while gently nudging the car to the center of a lane if a collision is imminent. Active Trace Control adjusts the brakes at each wheel, and modifies torque, to guarantee tight handling in corners. Inside, passengers will be kept comfortable by double-piston shocks, cleaner air, and a quieter cabin.

For full details on the Premium, Touring, Sport Touring, and Technology packages, you can check out the press release below. The 2011 Infiniti M37 and 2011 Infiniti M56 will be on display from today onward in Los Angeles.